Control of Uniform and Interconnected Macroporous Structure in PolyHIPE for Enhanced CO2 Adsorption/Desorption Kinetics

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• 作者：Quanyong Wang ; Yao Liu ; Jian Chen ; Zhongjie Du ; Jianguo Mi
• 刊名：Environmental Science & Technology
• 出版年：2016
• 出版时间：July 19, 2016
• 年：2016
• 卷：50
• 期：14
• 页码：7879-7888
• 全文大小：638K
• 年卷期：0
• ISSN：1520-5851

文摘

The highly uniform and interconnected macroporous polymer materials were prepared within the high internal phase hydrosol-in-oil emulsions (HIPEs). Impregnated with polyethylenimine (PEI), the polyHIPEs were then employed as solid adsorbents for CO₂ capture. Thermodynamic and kinetic capture-and-release tests were performed with pure CO₂, 10% CO₂/N₂, and moist CO₂, respectively. It has shown that the polyHIPE with suitable surface area and PEI impregnation exhibits high CO₂ adsorption capacity, remarkable CO₂/N₂ selectivity, excellent adsorption/desorption kinetics, enhanced efficiency in the presence of water, and admirable stability in capture and release cycles. The results demonstrate the superior comprehensive performance of the present PEI-impregnated polyHIPE for CO₂ capture from the postcombustion flue gas.